National Geographic has a product called Adventure Paper that lets you print your own custom, waterproof maps on a regular old inkjet printer. They claim it “will withstand the rigors of the outdoors, and is durable enough to last you through your entire backcountry adventure.” Waterproof, foldable, and temperature and tear-resistant, Adventure Paper looks like the perfect tool for trail hiking, camping, and other outdoor activities and adventure sports. The reviews seem good too.

Dave Anderson writes, “I have tested the Adventure Paper in rain and I have also exposed it to salt water while sea kayaking. It appears to be unaffected in either case. I have also subjected it to hamburger grease, mustard, barbeque sauce, soy sauce, pizza grease, barbeque potato chips and various sorts of less tasty goo while in the field. These all washed off with at the worst, minor stains, and most of them wiped off completely.”

Inkjet printers are best, and they discourage printing onto Adventure Paper with a laser printer. $19.95 for 25 8.5″x11″ sheets.